Distributors I know. BTW I'm not trying to make a big thing about piracy here, hence my off-the-cuff remark. But it's just basic economics - there's a fairly small but non-zero cost of doing a DVD issue even if its a rerun and some films just aren't going to earn it back.

Bear in mind that many, many films would not be profitable on their own, but are cross-subsidized by more popular films in package distribution deals, especially international ones.